Grated Onion Soup

Recipe first for 4 people based on Onion - cooking method oven.

Preparation:

Preparation: Melt the butter in a saucepan, add the sliced onions and let them simmer in a covered container over low heat for about half an hour. The onions must fall apart and not brown too much. Dust them with a pinch of flour, add salt, add a pinch of pepper and pour the hot broth over them. Cook for another 15 minutes. Divide the soup into small casserole dishes, place two slices of toasted bread on top, sprinkle with grated Emmenthal cheese, knobs of butter and a little pepper. Gratin in the oven at 200 degrees.